Molding-machine.



P. J. NILSSON.

MOLDING MACHINE.

APPLICATION rum MAY 22,1911.

1,1 18,672. Patented Nov. 24, 1914.

2 SHEETS-SHEET 1 IN VE N TOfl ATT'OHNEY U IT STAWENTOFFIOE- FRANS JUSTINUS NILSSON', OFHUSQVARNA, SWEDEN.

MOLDING-MACHINE.

new

To all whom it may concern Be it known that I, FRANS JUsTINUs NILs- N-i a Subject of the King of Sweden, re-

siding at H'usqvarna, Sweden, have invented certa n new and useful Improvements 1n MoldingrMachlnes, of which the following isa specification, reference being had to the drawings accompanying and forming a part hereof.

Thisihvention relates to the molding of rac l ators for steam or hot water, low-pres.-

sure sectional boilers and other similar api in the claims.

paratusespand the invention consists of a molding device which will be fully described hereinafter and finally pointed out In the accompanyingdrawings, Figure 1 shows a pattern-arrangement for two or more sections with the flask put on, filled and ready for pressing, Fig. 2 shows a vertical section of the same arrangement with figures of the drawings.

the pressed flask, and Fig.3 is a horizontal section on the line A, A in Fig. 2..

Similar reference characters indicate cor responding parts throughout the different Whenseveral sections are to be cast together in one piece, a longitudinally-slidable hollow plunger 1 (Figs. 1 and 2) is pressed upward means of a spring 2 and is H pushed downward by the pattern 3 when the mold is pressed while the pattern comes directly in contact with the upper face of the plunger; The highest position of the plunger is defined by a collar 4 screwed in its lower end, the upper end of which collar abuts against the lower face of an outwardly-directed flange 6 on a tubular casing 5, that extends into the plunger and that is fastened with its lower end to abracket 8 fixed to the pattern-plate'Z. The upperface of the casing 5 forms a bottom-support for the spring 2. The plunger 1 is guided partly by .thea pattern-plate 7 and partly by the casing 5 upon which the collar slides, it be ing at its lower end provided with an outi wardly-extending circumferential flange 9,

the object of which is to prevent the plunger from raising itself when in its lowest position.

Fig. 3 shows a hookll with a handle 10.

per pattern-plate strikes agalnst the upper plunger, in order that this latter may be Specification of Letters Patent. Patented Nov, 24 1914,; Application filed May 22, 1911. Seria1No. 62,687

the upper pattern-plate which in pressing. the mold must bear upon and correspond.

with the upper clean face of the plunger, in order that the mold may be placed at the. correct andproper pitch, 5. e., that the proper distance between the center-lines of the sections may be obtained.

In the upper end of the plunger abushing 16 of tempered steel isfastened on the a same level with the top-faceof the plunger and provided with a downwardextension forming a fastening for a sleeve 17, which serves for the purpose of protecting the interior of the plunger and the spring 2 against the ingress ofsand and dust. The

bushing 16 has a central hole into which enters a corresponding plug 18 projecting from the upper pattern, whereby the contraction of the patterns and the connecting parts is facilitated. The plug as well as the bushing is made of tempered steel and so arranged that they easily can be replaced when worn out.

The molding may be done in a doub1epress molding machine. 2'. e., a moldingmachine with one-half of the pattern placed upon the machine-table and the other half of iton a top-piece that can be ad uSted into proper. relative position with the former.

In order to get the proper quantity of sand intoeach mold-box or flask, so that the mold may attain the proper hardness, a sandmeasure 44 (Fig. 1) of suitable height 1s used. This sand-measure also serves as a stop for the pressing movement. Theup- "per pattern-plate is provided with a part that fits in the sand-measure with a very small play and has exactly the same height as the sand-measure. After the mold-box has been filled with sand and leveled off even, the pressing takes place until the upedge of the sand-measure, whereby the upper pattern, being all the time 1n full contact, presses against the face of the plunger.

The plunger is locked in its lowest position after the pressing, so that it'may not interfere with the lifting off of the mold.

The details, for instance the stopping devices for the highest and lowest position of the plunger, may be varied in several ways and the invention may be put in practice without any principal variations for the casting of sectional boilers in one piece or of other apparatuses consisting of a number of tween the two sections, a mold-box between said pattern-plates, and an upwardly spring actuated plunger in the lower pattern-plate lIlIl/llfi path of said projection of the upper pattern-plate and having its upper end in position to engage therewith free of the sand in said mold-box, said plunger having its upper part so shaped as, when depressed by said projection and in engagement therewith, to form that part of the mold-corresponding to the remainder of said connecting piece between thentwo sections.

2. A molding device, comprising a lower pattern-plate having the form of one face of one section of the body to be cast, an up per pattern-plate having the form of the opposite face of an adjoining section and having a downwardly-extending projection corresponding to a part of a connecting piece between the two sections, a mold-box between said pattern-plates, an upwardly denies of this, patent may be obtained for spring-Vactuated plunger in the lower pattern-plate in the path of said projection of theupper pattern-plate and having its upper endinposition to engage therewith free of the sand in said mold-box, said plunger having its. upperpart s0 shaped as, when depressedby said projection and in engagement. therewith, to form, that part of the ,Inold corresponding to the remainder of said connect ng piece between the two sections, a

removable downwardly-tapering centering plug, insaidprojection, and a removable bushing in said; plunger adaptedto; receive said plug.

3. A molding device, comprising a lower pattern-plate having-the form of one face of one section of the body to be cast, an upper pattern-plate having the form of the opposite face of an adjoining section and'having a downwardly-extending projection corresponding' to a part of a connecting piece between the two sections, a mold-box between a said pattern-plates, an upwardly spring-I actuated plunger in the lower pattern-plate in the path of said projection of the upper pattern-plate and having its uppervendti'n position to engagetherewith free of the sand in said mold-box, said plunger having its upper art so shaped as, when depressed by said projection and in engagement therewith, to form that part of the mold corre: sponding to the remainder of said connecting piece between the two sections, and

means for retaining the plungerin depressed position after withdrawal of the upper pat tern-plate. I 7

4. A molding device, comprisinga lower pattern-plate havingthe form of one face of one section of the body to be cast, an upper pattern-plate having the form of the oppo: site face of an adjoining section andhaving a downwardly-extending projection corresponding to a part of a connectingpiece between the two sections, a HlOlCl bOX between said patternplates, an upwardly springactuated plunger in the lower pattern-plate in the path of said projection ofthe upper pattern-plate and having its; upper end position to engage therewitlifree of the sandin said mold-box, said plunger having its upper part so shaped as, when depressed by said rojection and in engagementtherewith, to form that part ofthe mold corresponding to the remainder of said connecting piece between the two sections, and adjustable means for limiting the: upwardrise of the plunger.

In testimony that I claim the foregoing as my invention, I havesigned my name presence of two SdbSCI'lblIlg witnesses.

' FRANS JUSTINUS NILSSON;

l/l itnes ses: j l

' V. A. SOHILL,

GUSTAF Sol-11ml,

five cents each, by addressingthe Commissioner of ZPatentS,

Washington, D. 0 

